2. Using a straight edge and feeler gauges, check the cylinder head face for warp, which could lead to gasket failure. Replace the cylinder head if warped beyond the flatness limit. For specifications refer to Cylinder Head.
1. Cylinder head; 2. Straight edge
3. Inspect the valve guides for damage or wear.
4. If a valve guide is found to be worn beyond the service limit, the complete cylinder head must be renewed. For specifications refer to Cylinder Head.
5. Check the camshaft drive chain rubbing blades. Renew if worn or damaged.
Caution! Ensure all traces of fluid (coolant, oil etc.) are removed from the threaded holes in the crankcase. Should any fluid remain in any of the threaded holes, severe crankcase damage could result from hydraulic locking of head bolts on assembly of the engine.